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Organic constituents of strawboard waste

page 296

Organic Constituents of Strawboard Waste
Nicholas J. Lardieri
Research Assistant, Purdue University
Lafayette, Indiana
The study of strawboard waste has been going on at Purdue under the direction of Professor Don E. Bloodgood since August, 1945. This study is being sponsored by the National Council for Stream Improve¬ ment of the Pulp, Paper and Paperboard Industries. The disposal of waste waters has long been a problem to manufacturers of strawboard as well as being of serious concern to stream pollution and public health authorities. It was the goal of decreasing this stream pollution which caused the National Council to investigate these studies.
The work done before last year in the laboratory pretty well ascer¬ tained most of the more common characteristics of strawboard waste. These results, have been previously reported (1,2)*. The inorganic chemical analysis, the BOD—solids relationships of the various por¬ tions and of the total waste were comprehensively dealt with. Several biological-treatment methods were also tried on the waste. Some of the more important conclusions reached in the previous Purdue work include the following:
1. Sixty-eight percent of the BOD in total strawboard waste will pass through the mat of a Gooch crucible. Two-thirds of the BOD in the waste, therefore, is in a dissolved state.
2. The organic matter in strawboard waste is oxidized as readily as the organic matter in domestic sewage when the nutrients necessary for biologic growth are present.
3. Strawboard waste and sewage mixtures can be utilized as food for activated sludge.
4. First indications were that a trickling filter would provide the necessary purification of settled strawboard waste. Studies carried on into the winter months, however, showed the ineffectiveness of this method of treatment for year-around operation.
* Italicized figures in parentheses refer to entries in the Bibliography, page 303.
296

Organic Constituents of Strawboard Waste
Nicholas J. Lardieri
Research Assistant, Purdue University
Lafayette, Indiana
The study of strawboard waste has been going on at Purdue under the direction of Professor Don E. Bloodgood since August, 1945. This study is being sponsored by the National Council for Stream Improve¬ ment of the Pulp, Paper and Paperboard Industries. The disposal of waste waters has long been a problem to manufacturers of strawboard as well as being of serious concern to stream pollution and public health authorities. It was the goal of decreasing this stream pollution which caused the National Council to investigate these studies.
The work done before last year in the laboratory pretty well ascer¬ tained most of the more common characteristics of strawboard waste. These results, have been previously reported (1,2)*. The inorganic chemical analysis, the BOD—solids relationships of the various por¬ tions and of the total waste were comprehensively dealt with. Several biological-treatment methods were also tried on the waste. Some of the more important conclusions reached in the previous Purdue work include the following:
1. Sixty-eight percent of the BOD in total strawboard waste will pass through the mat of a Gooch crucible. Two-thirds of the BOD in the waste, therefore, is in a dissolved state.
2. The organic matter in strawboard waste is oxidized as readily as the organic matter in domestic sewage when the nutrients necessary for biologic growth are present.
3. Strawboard waste and sewage mixtures can be utilized as food for activated sludge.
4. First indications were that a trickling filter would provide the necessary purification of settled strawboard waste. Studies carried on into the winter months, however, showed the ineffectiveness of this method of treatment for year-around operation.
* Italicized figures in parentheses refer to entries in the Bibliography, page 303.
296